/Engine/Source/Runtime/Engine/Classes/EdGraph/EdGraphNode.h
Create a new pin on this node using the supplied pin type, and return the new pin
[UEdGraphPin](API\Runtime\Engine\EdGraph\UEdGraphPin) * CreatePin ( EEdGraphPinDirection Dir, const [FEdGraphPinType](API\Runtime\Engine\EdGraph\FEdGraphPinType) & InPinType, const TCHAR * PinName, int32 Index )